When setting boundaries or communicating your needs and feelings, you need to keep it "I" centered. So, if he brings up the convo again, something like this:

H: I'm really hurt that you went to a beautician to get waxed. You know I like to do it.
You: I'm sorry you feel that way. Given our sitch, I feel more comfortable going to a beautician.
H: Didn't you think about how I'd feel?
You: Not really. It wasn't my intention to hurt you, but it was my intention to take care of myself.

No bringing in OW, no argument, no pointing out what I loon he is. I-messages only. Don't give in to an argument or a baiting.

FWIW it seems like he feels guilty, knows he's messed up big time, and is trying to get your attention. Keep setting those boundaries...keep it in I-messages...and then, maybe in time, he'll find a clue somewhere.

SD

Me: 40
H: 43
H had EA from 2/06-9/06
Bomb 5/06
Piecing since 9/2006
3/2008: Boundary setting
7/2009: Boundary crossing~dropped my own bomb.
8/2010: Marriage finally on track!